PH6 THAI NGUYEN puoxc crA VA DAO TAO rHtIC THr cHeN Hec srNH cr6l Lop 9 NAM HQC 2021 2022 nrOx rHr roAx Thdi gian ldm bdi 150 philt, kh6ng k€ thdi gtan giao di (DG thi g6m c6 01 trang) , z(x t) tt Vx[.]
puoxc crA THr cHeN Hec srNH cr6l Lop NAM HQC 2021 - 2022 nrOx rHr: roAx PH6 THAI NGUYEN VA DAO TAO rHtIC Thdi gian ldm bdi: (DG Bni (7 tliGm Cho bi6u thtc P a Rft b Tim c Tim d D6t Bni (a tliGm *' -fi :zx+Ji - x+r/x+1 - J* philt, kh6ng k€ thdi gtan giao g6m c6 01 trang) 150 thi ,tt- z(x di -t) Vx-l bi6u thric P tri cria x d6 P =3 tri nh6 nh6t ctia bitiu thtc P nE L\ Tim gi5 tri cria x dA Q nh4n gi6 rringuy6n "r = m{t phing tqa d0 Oxy, ggi A, B ldn lugt ld tqa dQ giao di€m cta rludng th6ng (d): y = -2 voi tryc hoanh vd truc tung Tinh di€n tich tam gi6c oAB vitkhoing crich tir tlii5m dtin duong thhng @) b ciai c Tr€n clto a2 - b b2 g trinh x2 + =3x +2^{* (r)' y = *' c = c2 - a Tffi a tdy ba